Linda's Lethal Legs

You will need a step bench with two risers under each end,
and you will need an exertube. Run the tubing under the bench
and sit near one end of the bench. The tubing is behind you at
this point. Now, bring the tubing around the risers at that end,
and hook a handle over each shoe. Remind everyone to sit up
very straight and hold on to the sides of the bench for support.
Keeping the left foot on the floor, raise the right foot several
inches, with the knee still bent. You're ready to do leg
extensions. When finished with the right, move on to the left
leg.